Stock-Based Compensation and Other Employee Benefit Plans (Summary of Employee Stock Purchase Plan Activity) (Details) (ESPPs [Member], Employee Stock [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ESPPs [Member] | Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash proceeds (in millions)	$ 6.4	$ 1.3	$ 0.4
Number of common shares	454,523	90,614	29,162
Weighted average price per share	$ 14.19	$ 14.37	$ 14.85
Weighted average grant date fair value per share	$ 5.60	$ 4.19	$ 3.61